A novel strategy for producing three-dimensional (3D) porous Ti₃C₂T_x(MXene) networks by alkali-induced crumpling of Ti₃C₂T_xnanosheets is presented. These display high capacity and good rate performance as anode materials sodium-ion batteries.

Transition metal carbides and nitrides/carbonitrides (MXenes) with satisfactory conductivity, high specific surface area excellent hydrophilicity have attracted the attention of many researchers in field electrochemical sensors recent years. Etched MXenes usually show an accordion-like morphology; moreover, monolayer exhibit better electrical conductivity mechanical properties. The electronic chemical properties can be significantly changed by means compounding, hybridization modification....

Metal nanomaterials normally adopt the same crystal structure as their bulk counterparts. Herein, for first time, unusual 4H hexagonal Ir, Rh, Os, Ru and Cu nanostructures have been synthesized on Au nanoribbons (NRBs) via solution-phase epitaxial growth under ambient conditions. Interestingly, NRBs undergo partial phase transformation from to face-centered cubic (fcc) structures after metal coating. As a result, series of polytypic 4H/fcc bimetallic Au@M (M = Cu) core-shell has obtained. We...

Development of nonflammable separators with excellent properties is in urgent need by next-generation advanced and safe energy storage devices. However, it has been extremely challenging to simultaneously achieve fire resistance, high mechanical strength, good thermomechanical stability, low ion-transport resistance for polymeric separators. Herein, address all these needs, we report an situ formed silica@silica-imbedded polyimide (in SiO2@(PI/SiO2)) nanofabric as a new high-performance...

MXenes, as excellent candidate anode materials for sodium ion batteries (SIBs), suffer from sluggish ion-diffusion kinetics resulting the anchoring effect of negatively charged functional groups on their surface ions. Herein, we introduce positively conductive polyaniline (PANI) to induce self-assembly Ti3C2Tx MXenes into a three-dimensional PANI/Ti3C2Tx network. In this network, PANI not only intercalates nanosheets enlarge interlayer spacing, but also promotes negative-to-positive...

Abstract Low-temperature assembly of MXene nanosheets into three-dimensional (3D) robust aerogels addresses the crucial stability concern nano-building blocks during fabrication process, which is key importance for transforming fascinating properties at nanoscale macroscopic scale practical applications. Herein, suitable cross-linking agents (amino-propyltriethoxysilane, Mn 2+ , Fe Zn and Co ) as interfacial mediators to engineer interlayer interactions are reported realize graphene oxide...

Using electrolyte additives to manipulate the solid-electrolyte interphase (SEI) is an effective means optimize battery performance; however, how regulate their interactions with electrode surfaces, especially for those relatively inert ones, a huge challenge. Here we demonstrate feasible transgenic engineering as promising concept address this challenge Si anode platform. MoSe2 better gene in comparison pristine preferentially adsorbing and reducing widely used additive fluoroethylene...

The accelerated kinetic behaviour of charge carrier transfer and its unhindered surface reaction dynamic process involving oxygenated-intermediate activation conversion are urgently required in photocatalytic water (H2 O) overall splitting, which has not been nevertheless resolved yet. Herein, localized CdS homojunctions with optimal collocation high low index facets to regulate d-band center for chemically adsorbing activating key intermediates (*-OH *-O) have achieved H2 O splitting into...

Abstract As vitally prospective candidates for next‐generation energy storage systems, room‐temperature sodium–sulfur (RT‐Na/S) batteries continue to face obstacles in practical implementation due the severe shuttle effect of sodium polysulfides and sluggish S conversion kinetics. Herein, study proposes a novel approach involving design B, N co‐doped carbon nanotube loaded with highly dispersed electron‐deficient cobalt (Co@BNC) as conductive host S, aiming enhance adsorption catalyze redox...

MXenes have captured extensive attention in various fields by virtue of unique hydrophilicity, high conductivity and tunable surface terminations. In this review, the state-of-the-art progresses designing functional been summarized. Firstly, synthesis methods are summarized classified into HF etching, in-situ etching fluoride-free approaches based on effect chemistry MXenes. Secondly, factors that affect termination groups discussed, including methods, heat treatment temperature atmosphere....

A large number of mines are closed or abandoned every year in China. Geothermal utilization is one the important ways to efficiently reuse underground resources mines. How calculate volume and distribution water storage space key accurately evaluate sustainable geothermal production In this paper, according multi-scale characteristics mine, flow heat transfer equations sorted out systematically, calculation methods different secondary volumes derived detail. Taking Jiahe mine as background,...

Abstract Although MXene has attracted great interest in diverse fields, it is susceptible to oxidation water (H 2 O) with transition metal ions such as Co 2+ , Fe and Cu which pronounced at high temperatures. This impedes the preparation of MXene‐based composites their functional applications. Here, this study revealed that increases maximum average atomic charge H O improve reactivity O, leads fact catalyzes Ti 3 C T x MXene. Furthermore, addition N,N‐dimethyl formamide (DMF) reduces...

Emerging economies and ecosystems are critically dependent on fossil fuels, a country’s energy dependence is significant measure of its reliance foreign suppliers. This study evaluates the impact intensity, CO 2 emission utilization renewable resources in 35 developing 20 developed nations, as well connection between (REN), GDP growth, emissions. employs generalized linear model (GLM) robust least squares (RLS) method to assess inverse association economy policymakers, utilizing unique panel...

Electrostatic self-assembled NiCoP/MXene composites have excellent electrochemical performance.

Ti3C2Tx MXene often suffers from poor lithium storage behaviors due to its electrochemically unfavorable OH terminations. Herein, we propose molecular-level interfacial chemistry regulation of with phytic acid (PA) directly activate Through constructing hydrogen bonds (H-bonds) between oxygen atoms PA and terminations on surface, charge distribution has been effectively regulated, thereby enabling sufficient ion-storage sites expediting ion transport kinetics for high-performance energy...

Carbon dots (CDs) prepared from biomass usually produce poor quantum yield and reproducibility. A fine separation of raw materials may enhance the fluorescence performance. In this work, embryos cumin seeds were precisely chosen as carbon source to prepare through hydrothermal method. The obtained product (CDs-E) possessed a higher 10.60 % than those synthesized with testas or whole seeds, which be due relatively smaller particle size more C-N functional groups. Rutin, common natural active...